I used Redis in many high scale applications and it has been working very well so far. Primarily we use it as a cache backend, and also as a temporary storage

I used Redis in many high scale applications and it has been working very well so far. Primarily we use it as a cache backend, and also as a temporary storage for processing data (the expire feature plays very nicely). in a recent project I was trying to store more information in Redis (such as view counts etc..) but faced the problem of querying the data later (as it relies mainly on keys/regexp).